diff --git a/nova/tests/functional/api/openstack/placement/fixtures/gabbits.py b/nova/tests/functional/api/openstack/placement/fixtures/gabbits.py
index 49f0e7a3d9d0..bf23b4fc128c 100644
--- a/nova/tests/functional/api/openstack/placement/fixtures/gabbits.py
+++ b/nova/tests/functional/api/openstack/placement/fixtures/gabbits.py
@@ -166,6 +166,7 @@ class AllocationFixture(APIFixture):
         # Create a first consumer for the DISK_GB allocations
         consumer1 = tb.ensure_consumer(self.context, user, project)
         tb.set_allocation(self.context, rp, consumer1, {'DISK_GB': 1000})
+        os.environ['CONSUMER_0'] = consumer1.uuid
 
         # Create a second consumer for the VCPU allocations
         consumer2 = tb.ensure_consumer(self.context, user, project)
diff --git a/nova/tests/functional/api/openstack/placement/gabbits/with-allocations.yaml b/nova/tests/functional/api/openstack/placement/gabbits/with-allocations.yaml
index 06d0ef4ce012..fac6dd051073 100644
--- a/nova/tests/functional/api/openstack/placement/gabbits/with-allocations.yaml
+++ b/nova/tests/functional/api/openstack/placement/gabbits/with-allocations.yaml
@@ -25,6 +25,24 @@ tests:
       $.usages.DISK_GB: 1020
       $.usages.VCPU: 7
 
+- name: get allocations
+  GET: /resource_providers/$ENVIRON['RP_UUID']/allocations
+  response_headers:
+      content-type: /application/json/
+  response_json_paths:
+      # Bug#1785382: It doesn't show all the consumers
+      # on the resource provider
+      # $.allocations.`len`: 3
+      $.allocations.`len`: 2
+      $.allocations["$ENVIRON['CONSUMER_0']"].resources:
+          DISK_GB: 1000
+      $.allocations["$ENVIRON['CONSUMER_ID']"].resources:
+          VCPU: 6
+      # $.allocations["$ENVIRON['ALT_CONSUMER_ID']"].resources:
+      #     VCPU: 1
+      #     DISK_GB: 20
+      $.resource_provider_generation: 5
+
 - name: fail to delete resource provider
   DELETE: /resource_providers/$ENVIRON['RP_UUID']
   status: 409